Rio Tinto Alcan

Alcan Sustainability Report Highlights Value Creation

September 28, 2005

Montreal, Canada – Alcan Inc. (NYSE, TSX: AL) has published its 2005 Sustainability Report, an annual update of the Company’s progress on sustainability. Available in print and on Alcan’s website (www.alcan.com/SR05), the report provides updated information on the economic, environmental and social performance of the Company’s global operations and the leading role it has taken over the past year.

“Leading companies build sustainable businesses by embedding strong governance and corporate responsibility into their strategies and culture. At Alcan, we’ve recognized that business and sustainability go hand-in-hand,” said Travis Engen, President and Chief Executive Officer of Alcan Inc. “It is the integration of environmental stewardship, economic performance and the well-being of our communities that drives fundamental value creation,” he added.

Alcan’s commitment to sustainability is translating into concrete actions through the Company-wide implementation of AIMS, the Alcan Integrated Management System, consisting of Value Based Management, Continuous Improvement, and EHS FIRST – Alcan’s approach to environment, health, and safety.

Alcan’s sustainability milestones include:

Joining the United Nations Global Compact, a voluntary international initiative for businesses promoting the development of a more sustainable and inclusive global economy;

Co-chairing the Working Group on Accountability and Reporting at the World Business Council for Sustainable Development as well as the World Economic Forum’s Water Initiative;

Participation in the G8 Climate Change Roundtable;

Selection as a member of the Dow Jones Sustainability World Index (DJSI World) for the fourth time in five years and named leader in its sector;

Selection as one of the top companies for Corporate Social Responsibility by the Globe and Mail annual ranking in Canada – rated number one in its sector and chosen as one of the special “World Leaders” for continued international recognition in this field.

This year, Alcan also is chairing the International Institute for Sustainable Development (IISD) and the International Business Leaders Forum (IBLF). Both organizations contribute to sustainability by promote responsible business practices internationally and advancing policy recommendations bearing on international business.

Alcan is a multinational, market-driven company and a global leader in aluminum and packaging. With world-class operations in primary aluminum, fabricated aluminum as well as flexible and specialty packaging, aerospace applications, bauxite mining and alumina processing, today’s Alcan is well positioned to meet and exceed its customers’ needs for innovative solutions and service. Alcan employs almost 70,000 people and has operating facilities in 55 countries and regions.